二维绕障井实用轨道设计方法

Practical Two-Dimensional Well Path Design

进入开发中后期的老油田,绕障井的数量持续增加。由于三维绕障井轨道设计的难度及工作量相对较大,因此在条件允许的情况下应尽可能设计成二维井眼与轨道。以已钻井为障碍物模型,研究了障碍物在空间和设计平面上的描述方程,建立了方便实用的二维绕障井设计方法,并给出了设计实例。研究表明:在很多情况下,通过合理地选取井身剖面和设计参数,采用二维轨道可以绕过已钻定向井。

In old oilfields, more and more wells have to be drilled to pass previous wells. Considering the difficulties of designing a three dimensional well trajectory and the amount of work associated with it, a two dimensional well trajectory is always designed if possible. Using a drilled well as obstacles, equations to describe positions of obstacles at designed plane and space were developed. Based on these equations, a practical method to determine two dimensional well trajectory was established. The results show that in many cases a two dimensional wellpath can avoid previously drilled wells with proper wellpath and parameters.